Ba5(Ir,Ru)3O12: Eine neue Kristallstruktur mit isolierten Oktaedertripeln

Ba₅(Ir, Ru)₃O₁₂: A New Crystal Structure with Isolated Octahedratripel A new compound, Ba₅(Ir, Ru)₃O₁₂ was prepared and investigated by single crystal X-ray work (space group D-Pnma; a = 10.853; b = 5.897; c = 19.819 Å; Z = 4). ?Isolated”? octahedratripel of face connected Ir/RuO₆] groups are characteristic to this oxide. Ir and Ru are in statistic distribution. One of these metal positions contains an access of Ir, the other two of Ru, respectively. Coulomb Energy calculations show a dominant oxidation state +4 on one of the three Ir/Ru-point positions.